Efficacy

/ˈɛf.ɪ.kə.si/noun

The ability to produce a desired or intended result

effectiveness.

The efficacy of the new marketing strategy exceeded expectations.Marketing
We need to measure the efficacy of our training programs.HR

Origin: From Latin efficacia, from efficax 'powerful, effective', from efficere 'to accomplish'

Jan 5January 6, 2026Jan 7

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